Lourdes Garcia-Navarro

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LULU GARCIA-NAVARRO, HOST:

Copyright 2018 NPR. To see more, visit http://www.npr.org/.

LULU GARCIA-NAVARRO, HOST:

Last week, a van plowed into a busy Toronto sidewalk, killing 10 people in what appeared to be a deliberate act.

The suspect in the attack, Alek Minassian, was quickly linked to an online community of trolls and violent misogynists who call themselves "incels" — a term that stands for "involuntarily celibate."

The arrests of two black men waiting for a friend at a Philadelphia Starbucks continues to fuel conversations about implicit racial bias in public spaces. Many of those conversations begin with "I'm not surprised."

"When I have to move through predominately white spaces I'm always on alert and my anxiety is always high because I don't know what's going to happen at that moment," says Elon James White.

Juliana Hatfield was a darling of the '90s indie music scene. She played with Blake Babies and The Lemonheads and had a hit with the edgy pop song, "My Sister." Hatfield released a string of alternative albums since those days, full of distorted guitars and strong vocals.

When The Exorcist, based on the novel by William Blatty, came to theaters in 1973, it captured the public imagination. Or more accurately, the public's nightmares.

Exorcisms aren't just the stuff of horror movies — hundreds of thousands of Italian Catholics reportedly request them each year. But when William Friedkin directed the movie, he'd never actually seen an exorcism. It would be four more decades before he actually witnessed one.

Last year, when neo-Nazis and members of the so called alt-right demonstrated in Charlottesville, Va., many Americans evinced shock that such a thing could happen: A demonstration of the white power movement, in 2017. But it's only the latest in a history of social activism that goes back decades — and, as Kathleen Belew argues in her new book, Bring the War Home, we ignore that history at our peril.

Zoologist Lucy Cooke says humans have got it all wrong about sloths. "People think that because the animal is slow that it's somehow useless and redundant," she says. But in fact, "they are incredibly successful creatures."

Cooke is the founder of the Sloth Appreciation Society and the author of a new book called The Truth About Animals: Stoned Sloths, Lovelorn Hippos, and Other Tales from the Wild Side of Wildlife. The book aims to set the record straight on some long-held misconceptions about the animal world.

Bailey Davis was a Saintsation — a cheerleader for the New Orleans Saints. That is, until she posted a photo of herself in a one-piece lace bodysuit on her private Instagram account.

The romance genre is a juggernaut that continues unabated.

It's a billion-dollar industry that outperforms all other book genres, and it's remarkably innovative, with a strong tradition of independent and self-publishing.

Copyright 2018 NPR. To see more, visit http://www.npr.org/.

RENEE MONTAGNE, HOST:

Less than two years after Donald Trump won a western Pennsylvania congressional district by double digits, a special election race between a young Democrat and a deeply conservative Republican is now closer than either side had expected. The congressional race is being run in Pennsylvania's 18th district, but the March 13 election is expected to offer clues about how voters will turn out in the November midterms.

Since this frightened mom crossed the border with her son in early 2017, fleeing gang violence in El Salvador, she has felt bewildered by the vast complicated immigration system in the United States.

NPR is not using her name for her protection.

In the summer of 1967, Linda Walker was at Girl Scout camp in North Carolina when a lightning bolt struck her.

She says she was in a tent with three other girls when they all ran out after the crackle and boom. Walker was on the floor, unresponsive.

"But as Girl Scouts you always keep up with your buddy — you never lose track of your buddy," Walker says. "And my buddy walked out, ran out of the tent without me, but realized I wasn't with her and came back. Had she not done that, I wouldn't be here today ... because she saved my life."

This past week, a FedEx employee from Germantown, Tenn., made a massive discovery — and it wasn't in any packages. John Pace found the largest prime number known to humankind.

And that number goes on to more than 23 million digits.

"So it's longer than anybody really wants to sit down and hear," he says.

If you're not great at math, here's a primer: Prime numbers can only be divided by 1 and themselves.

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